Hands-On Postural Assessment for Seating

Interview · Assessment in sitting · Assessment in supine · Summary of findings
Posture & Mobility
www.postureandmobility.com
Version 5 · 2026

Document all findings from the hands-on assessment in sitting and supine, completed by a trained clinician. Measures use the standardised definitions in Waugh & Crane's Clinical Application Guide to Standardized Wheelchair Seating Measures (see References). Further documentation may be needed for wheelchair and seating provision.

1Interview & history

Start with the person, then their health, function and equipment. This follows the person-centred, individualised assessment the WHO Wheelchair provision guidelines (2023) recommend.

About the person

Interests & activities
Communication

Diagnoses, medical & surgical history

Relevant conditions
GMFCS level (if applicable)
Seizures
Surgical history
Reasons for admission

Tone & movement

Where
Tone management
Pain

Body systems

Respiration

Digestion & feeding

Route

Circulation

Continence

Sleep

Sleep position(s)
Sleep issues

Skin integrity & pressure injury risk

The risk domains below follow the International Pressure Injury/Ulcer Guideline, 4th edition (NPIAP / EPUAP / PPPIA, 2025). The guideline says to use a structured approach, include a full skin assessment and use clinical judgement. Don't rely on a tool's total score alone: use its subscales to target prevention.
Current pressure injury?
History of pressure injury?

Activity & mobility

Skin & tissue status

Perfusion, circulation & oxygenation

Nutrition

Moisture

Sensory perception

Other

Weight shifting

Independent, consistent & effective?
Braden subscalesSensoryMoistureActivityMobilityNutritionFriction / shearTotal
Score

Current equipment & technology

Tick what's in use. Record make/model, size, age, fit and condition.

ItemTypeDetails, fit & conditionHrs / day

Mobility & independence

Manual wheelchair
Propulsion method
Powered wheelchair
Transfers
Walking
Activities of daily livingIndependentSet-upAssistedDependentNotes

Outcome measures

2Assessment in sitting

A snapshot of this moment. Complete this section with the person in their current seating system, as they are. Don't reposition them or change anything: leave lateral supports, arm supports, pelvic positioning belt etc. as found.
Current seating system Seat-to-back angle ° Measure on the current seating system. Used later to work out the hip flexion the seating requires (hip flexion = 180° − seat-to-back angle, e.g. 100° → 80°).

ALife Box · relationship between the ribs and the pelvis

Landmarks: R and L ASIS, and the inferior angle of the ribs (lowest point of the rib cage) on each side. Picture the box joining these four points.

Tick all that apply (e.g. closed and a parallelogram).
If parallelogram: ribs shifted towards relative to the ASISs
Draw the shape you see (inferior angle of ribs above, ASISs below; viewed from the front)
  • Open: space between the ASISs and the ribs
  • Closed: little space between the ASISs and the ribs
  • Symmetrical: same distance between ASIS and ribs on both sides

BPelvic position

Frontal plane
If measured Frontal pelvic angle ° Frontal sternal angle ° towards
Landmarks: Frontal pelvic angle: R and L ASIS; reference = horizontal. Frontal sternal angle: upper and lower sternal notch; reference = vertical (viewed from the front).
Transverse plane
If measured Transverse pelvic angle °
Landmarks: R and L ASIS, viewed from above; reference = line across the seat (side to side).
Sagittal plane
If measured Sagittal pelvic angle ° (+ posterior / − anterior tilt)
Landmarks: ASIS and PSIS (line perpendicular to the ASIS–PSIS line); reference = vertical, viewed from the side.

CSitting footprint

A rough check of loading areas for symmetry, gaps and peak pressure. Score each area 0–3, then use Notes for finer grading (e.g. 2+, 2−, 3+++) and to say exactly where (e.g. lateral aspect of foot only, mid-femur only, inferior angle of scapula).

0 = no contact1 = contact, no load2 = optimal load3 = excessive load

Inferior support (seat & feet)

AreaRLNotes (grading +/−, exact area)

Posterior support (back)

AreaRLNotes (grading +/−, exact area)
MidlineScoreNotes (grading +/−, exact area)
Upper limb loading (arm supports / tray)

Loading map

Fills in automatically as you score each area above. Each area is coloured by its loading score, so you can see asymmetries, gaps and peak pressure at a glance. On paper: write the score in each area (or shade it) to build the same picture. An asterisk (*) means there's a note for that area.

✓Sitting summary

!Screening result · is a hands-on assessment in supine needed?

If the person has an open, symmetrical Life Box, a neutral pelvis in all three planes, and optimal loading posteriorly and inferiorly with no asymmetry, gaps or peak pressure areas, a full hands-on assessment in supine is not indicated. Any asymmetry or flattening of the Life Box, any pelvic deviation from neutral in any plane, or any asymmetry, gap or excessive pressure means a supine assessment is necessary, and no changes to the seating system should be made or suggested until it has been done.

3Assessment in supine

On a firm plinth or mat. Split into Pelvis-up (finding the optimal Life Box) and Pelvis-down (what the hips, knees and ankles allow while that Life Box is kept).

APelvis-up · mobility & position

Goal: find this person's optimal Life Box, their resting position in supine. In each plane, assess mobility first, then record the optimal / resting position. Each finding is recorded pelvis first, then trunk.
Optimal = resting. Move slowly and stop just before you feel any tension or stretch, or see any movement. That point is the optimal position to record. If the Life Box (or a joint) can be pushed further but only against tension or stretch, that is no longer resting.
Measuring in supine: take the long axis of the plinth as the vertical reference (Y) and a line across the plinth as horizontal (Z).
Frontal plane
e.g. when the problem comes from the pelvis up, a L pelvic obliquity often goes with a R lateral trunk lean: the R side of the pelvis is hitched up towards the ribs because the R lateral trunk flexors are shortened (and the reverse for a R obliquity).
Optimal / resting position Frontal pelvic angle ° Frontal sternal angle ° towards
Landmarks: Frontal pelvic angle: R and L ASIS; reference = line across the plinth. Frontal sternal angle: upper and lower sternal notch; reference = long axis of the plinth (Waugh & Crane, Figs 2.25 & 2.27).
Transverse plane
⚠ Make sure the legs can move freely, so the hips aren't driving the pelvic rotation.
Optimal / resting position Transverse pelvic angle °
Landmarks: R and L ASIS, viewed from above (from the feet in supine); reference = line across the plinth.
Sagittal plane
With a large anterior pelvic tilt: flex the legs as much as needed to bring the pelvis as close to neutral as possible (if there is lumbar mobility), then assess hip extension in pelvis-down (step 2).
Optimal / resting position Sagittal pelvic angle (pelvic tilt) °
Landmarks: Sagittal pelvic angle: ASIS and PSIS (line perpendicular to the ASIS–PSIS line), viewed from the side. Posterior tilt = +, anterior tilt = −. In supine, measure relative to the trunk lying on the plinth.
Thoracic spine (mid–upper): extension
If they can extend through the thoracic spine, support that extension in sitting. If they can't, accommodating the kyphosis is a key feature of the back support.
Shoulders: protraction
R shoulder
L shoulder

Optimal Life Box

Landmarks: R and L ASIS, and the inferior angle of the ribs on each side.

Tick all that apply.
If parallelogram: ribs shifted towards relative to the ASISs
Draw the optimal shape

The pelvis-up findings show the position the pelvis will need to be in when sitting.

BPelvis-down

Keep the optimal Life Box (from pelvis-up) for the rest of the pelvis-down assessment. For every movement (hips, hamstrings / knees, ankles, abduction / adduction, rotation), stop just before any tension or stretch is felt, or any movement of the pelvis or Life Box is seen. That point is the resting position to record.

1Pelvic tilt held during pelvis-down

Sagittal pelvic angle held ° Leave blank to use the pelvis-up value.

2Hip flexion / extension · one measurement

Start with the hip in the position where the optimal Life Box (from pelvis-up) is kept, with the knee relaxed. Slowly flex / extend the hip. Stop just before any of these happen, and measure there:

  • any tension or stretch is felt
  • the pelvis moves: posterior tilt when flexing, anterior tilt when extending, or an obliquity (the pelvis hitches up on the side being tested)
  • the Life Box changes or shifts
  • pain or tone appears

Limited flexion and limited extension are the same measurement seen from either end, so a hip will only ever be limited one way relative to the seating. Record the resting position below, and the range if useful.

Measure whichever you use. The form works out the others.

MeasureRL
Hip flexion (traditional goniometry)  measured against:
Landmarks: axis over the greater trochanter; stationary arm along the lateral midline of the trunk (or the pelvis); moving arm along the lateral midline of the femur, towards the lateral femoral condyle.
°°
Thigh-to-trunk angle (anterior side)
Landmarks: lateral hip centre point (axis), lateral lower neck point, lateral femoral condyle.
°°
Thigh-to-pelvis angle (anterior side)
Landmarks: ASIS and PSIS (stationary arm along the perpendicular to the ASIS–PSIS line), lateral hip centre point (axis), lateral femoral condyle.
°°
Range where the pelvis / Life Box stays at rest (optional, in hip flexion)
e.g. from 70–80° hip flexion there was no movement in the pelvis / Life Box; above 80° there was a posterior pelvic tilt; below 70° there was tension and an anterior pelvic tilt.
–°–°
Hip flexion and the seating angles add up to 180°
• Thigh-to-trunk = 180° − hip flexion measured against the trunk
• Thigh-to-pelvis = 180° − hip flexion measured against the pelvis (true hip flexion)
• Neutral pelvis (sagittal pelvic angle 0°): thigh-to-trunk = thigh-to-pelvis = 180° − hip flexion
• With a pelvic tilt: thigh-to-pelvis = thigh-to-trunk + pelvic tilt (posterior +, anterior −)
So if only hip flexion was measured, both seating angles can still be worked out from it and the pelvic tilt.
Example: hip flexion 85° (against trunk), posterior tilt +15° → thigh-to-trunk 95°, thigh-to-pelvis 110°, true hip flexion 70°.
R hip: what happened just past the resting position?
L hip: what happened just past the resting position?
Hip flexion the seating requires ° Usually 90°. More if sitting in a bucket / dump, less with an open seat-to-back angle. Used to decide whether hip flexion is limited relative to the seating.

3Knee extension / flexion

R knee limited by
L knee limited by

Rectus femoris (e.g. with limited hip extension / anterior pelvic tilt): flex the knee and stop just before tension or stretch, or the pelvis is pulled into an anterior tilt. This person may need more knee extension, with the foot in front of the foot support.

Joint (less common, but possible): e.g. a knee contracture, where there is no additional muscle tension and the pelvis doesn't move, but the knee simply has no further movement. Record the angle where the movement stops.

Keep the hip flexed to the angle found above. Extend the knee and stop just before any hamstring tension or stretch is felt, or the pelvis moves (posterior tilt, obliquity or a change in the Life Box).

AngleRL
Thigh-to-lower-leg angle (posterior side)
Landmarks: lateral femoral condyle (axis), lateral hip centre point, lateral malleolus.
°°
Range where the pelvis / Life Box stays at rest (optional, thigh-to-lower-leg angle)
e.g. from 90–110° there was no movement in the pelvis / Life Box; beyond 110° there was hamstring tension and a posterior pelvic tilt.
–°–°
Knee flexion = 180° − thigh-to-lower-leg angle
R knee: what happened just past the resting position?
L knee: what happened just past the resting position?
Thigh-to-lower-leg angle the seating requires ° Depends on the foot support / hanger position (e.g. about 90° with feet under the knees, more with front rigging). Used to decide whether knee extension is limited relative to the seating.

4Ankle dorsiflexion / plantarflexion

Keep the hip and knee at the angles found above. Dorsiflex the ankle slowly and stop just before any tension is felt in the Achilles tendon / gastrocnemius, the knee or hip angle changes, the pelvis moves (e.g. a posterior pelvic tilt, or pelvic rotation to bring the origin and insertion of gastrocnemius closer together), the Life Box changes, or pain or tone appears.

AngleRL
Lower-leg-to-foot angle (anterior side, optional)
Landmarks: lateral heel point (axis), lateral femoral condyle, lateral malleolus, lateral toe point.
°°
Ankle: lower-leg-to-foot < 90° = dorsiflexion, > 90° = plantarflexion
R ankle: what happened just past the resting position?
L ankle: what happened just past the resting position?
R foot at rest (for the foot support)
Frontal plane (sole)
°
Transverse plane (foot angle)
°
L foot at rest (for the foot support)
Frontal plane (sole)
°
Transverse plane (foot angle)
°

Hip & knee diagram · steps 2, 3 and 4 together

5Hip abduction / adduction

Keep the leg at the hip and knee flexion angles found above. Record the resting position: stop just before any tension or stretch, or any pelvic rotation.

Range where the pelvis / Life Box stays at rest (optional, write add / abd with each value)RL
e.g. from 10° add to 15° abd there was no pelvic rotation; beyond 15° abd there was adductor tension and a R pelvic rotation.
––
R hip: what happened just past the resting position?
L hip: what happened just past the resting position?
Landmarks: thigh line from the hip joint centre to the centre of the patella, compared with a line perpendicular to the ASIS–ASIS line (neutral). Watch the ASISs for pelvic rotation.

6Hip internal / external rotation

Same leg position. Stop just before any tension or stretch, or any pelvic obliquity.

Range where the pelvis / Life Box stays at rest (optional, write IR / ER with each value)RL
e.g. from 20° ER to 5° IR there was no pelvic obliquity; beyond 5° IR there was tension and the pelvis hitched up.
––
R hip: what happened just past the resting position?
L hip: what happened just past the resting position?
Landmarks: with hip and knee flexed, lower leg line from the tibial tuberosity to the midpoint of the ankle, compared with vertical (neutral). Watch the ASISs for pelvic obliquity.

CMeasurements & observations in supine

Lower limb circumference

Checks for asymmetry in thigh mass that could contribute to a pelvic obliquity. Less mass under one side lets that side sit lower. The solution is to raise the seating surface under the low side to make up for the missing mass, so the pelvis sits level.

LevelR (cm)L (cm)Difference
5 cm above the patella
Landmarks: measure 5 cm up from the superior pole of the patella, same level both sides.
—
Proximal thigh, as close to the groin as possible
Landmarks: as high in the groin as possible, at the same distance from the patella on both sides.
—

Chest wall · optional, e.g. Goldsmith Indices of Body Symmetry (trained measurers)

Landmarks: crook lying with the pelvis and shoulders level; measure at the level of the xiphoid process: xiphoid process to the lateral border of the chest on each side, and chest depth at the xiphoid.
Width (R + L)Depth : width ratioRight : left ratio
———

R : L ratio = 1 means symmetrical; below 1 = anticlockwise, above 1 = clockwise (Goldsmith convention).

Rib flare
Sternal–spinal line

Linear body measures · optional (Waugh & Crane, Fig. 4.2; measure as defined there)

MeasureR / single (cm)L (cm)MeasureR / single (cm)L (cm)

4Summary of findings

The shaded sections fill in automatically from your entries above. Add your clinical reasoning in the boxes underneath.

Key measures (from supine, to apply in sitting)

Translating to the seating system · side view

Show seated as Tilt in space °

Frontal & transverse planes

Clinical decision making · pelvis-up findings

Each card appears only when that finding is recorded. Findings can occur alone or together, so consider every card that applies.

Clinical decision making · pelvis-down findings

Make sure all pelvis-up findings are accounted for first.

Approach chosen for limited hip flexion
Approach chosen for limited knee extension (hamstrings)
Approach chosen for limited knee flexion (rectus femoris)
Putting it together

Any combination of these findings can exist. Always start pelvis up, then work pelvis down.

For example, a pelvic obliquity can come from:

  • limited lateral trunk flexion: lift the seat under the high side;
  • asymmetrical mass: usually add under the low side, but limited lateral trunk flexion cancels this out, so it's no longer needed;
  • limited contralateral hip flexion: open the hip angle;
  • limited ipsilateral hip external rotation.

There are almost always compromises to be made for activities and participation. Go back to the ICF model: this assessment covers Body Function & Structure. Then discuss how each potential solution fits within Activities, Participation and Environmental Context.

Different seating systems can prioritise different aspects, for example:

  • a comfort chair at home can prioritise body function & structure;
  • a power chair for community access and social participation;
  • a manual chair for transport in a vehicle / long-distance travel, for ease.
Always consider the full 24-hour period and where this person is throughout it.

Key features of the seating system · for the rep

Built from the findings and the approach chosen above. Check and edit before sending. The cushion zones fill in automatically; change any zone with its drop-down.

ZoneSet as
build uplevellevel, extra supportslope down (GTs and femurs only: the ITs are never sloped, as that increases shear and sliding)standard / pelvis-up positionkeep clear

Clinical reasoning

Key features of the seating system needed for skin protection, postural support and stability for function, with likely positive and negative effects
ComponentKey features & rationale
Was a seating solution simulated?

References

  1. Waugh K, Crane B. A Clinical Application Guide to Standardized Wheelchair Seating Measures of the Body and Seating Support Surfaces (rev. ed.). Denver, CO: University of Colorado Denver; 2013. Definitions and landmarks used here are from Figs 2.3, 2.5, 2.8, 2.10, 2.25, 2.27 & 4.2. The diagrams on this form are simplified drawings, not reproductions. Free download: ucdenver.edu (Center for Inclusive Design and Engineering).
  2. ISO 16840-1:2006. Wheelchair seating, Part 1: Vocabulary, reference axis convention and measures for body segments, posture and postural support surfaces.
  3. National Pressure Injury Advisory Panel, European Pressure Ulcer Advisory Panel and Pan Pacific Pressure Injury Alliance. Prevention and Treatment of Pressure Ulcers/Injuries: Clinical Practice Guideline. The International Guideline, 4th ed. Haesler E (Ed.). 2025. internationalguideline.com (chapter: Pressure Injury Risk).
  4. World Health Organization. Wheelchair provision guidelines. Geneva: WHO; 2023. ISBN 978-92-4-007452-1.
Disclaimer

Posture & Mobility does not collect or store any data entered into this form; information stays on your device, and you are responsible for storing it securely. Automatically generated numbers, angles, diagrams, summaries and suggestions may contain errors and must be checked by the clinician. All suggestions are guidance only and do not replace your own clinical reasoning and judgement. Posture & Mobility (Sharon Sutherland and Jennifer McKee) accepts no responsibility for assessments, recommendations, prescriptions or outcomes based on this form.

Posture & Mobility does not collect or store any information entered into this questionnaire; it stays on your device until you choose to save or send it. This questionnaire collects background information before an appointment. It is not a clinical assessment and does not give advice; please talk to your clinician about any questions or concerns.